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Hewlett-Packard is best known for making printers. That changed with its nearly $19 billions purchase of Compaq, which gave HP an entire PC line, including the iPAQ handhelds. And now it enters the mobile-phone market with the HP iPAQ 510 Voice Messenger, HP's first real cellphone.

There are already several smart-phones out there and iPAQ 510 doesn't have such nifty tools like Palm Treo's touch screen or Blackberry's scroll wheel. What it offers instead is a built in voice recognition system, which explains the "Voice Messenger" in its name. You want the iPAQ to take dictations for an email? Done. Then command it to send it to proper address.

Because it emphasizes on voice commands, HP's designers thought it unnecessary to equip the iPAQ 510 with a full keyboard-virtual or otherwise-and made do with a numeric keypad, which can be tedious and occasions where you do have to write email (such as when you're in really noisy venue like a sports bar or during an office meeting).

Also take note that dictated emails are saved and sent as audio attachments- a WAV file-which means the recipient also has to listen to it. Not as convenient as a text document but definitely cool.

The iPAQ 510 is also equipped with voice over Internet protocol (VoIP) capabilities and the latest Windows Mobile 6 operating system and works really fast on Wi-Fi.

Then there is the phone's stylish look: Black edges and keypad against a gray body with a 1.3-megapixel camera on the back side.

The other wow factor of the iPAQ 510 is that it can read aloud messages-either email or SMS- you have received. (Unfortunately you can't dictate SMS messages). These will be read by robotic female voice so make sure these are not from that hot chick you met last night or an irate girlfriend or your ever-doting mother.

More than 20 voice commands available on the iPAQ 510 offer customers hands-free operation. You can navigate through phone and calendar tasks and speak to starts applications. (It gets tricky, however, with hard-to-pronounce names, so when calling, say, Iranian President Mahmoud Ahmadinejad, just search for his number manually).